Fuel shut-off signal voltage too high from ECM to fuel injection pump. Battery voltage sense input above target charging voltage during engine operation. CKP sensor voltage input below the minimum acceptable voltage. But if your Jeep check engine light doesn’t require a serious repair and you have the expertise to handle the job yourself, check out our Jeep Repair Manuals. Energizing Heated Air Intake does not change intake air temperature sensor an acceptable amount. Problem detected in the clutch switch circuit. Intake manifold air temperature is above the engine protection limit. - DTC 24 will be displayed by 2 flashes, short pause, and then 4 more flashes. trans. An open or shorted condition detected in the A/C clutch relay control circuit. Results: As you can see in the video above, it is very simple process to diagnose the check engine codes on a Jeep Wrangler YJ. Engine coolant temperature sensor input below the minimum acceptable voltage. trans. 98 jeep wrangler 4.0 sport inline 6. the check engine light came on, loss of power on highway. Intake Air Heater Relay #2 Control Circuit, Problem detected in #2 air heater solenoid/relay circuit (not heater element), Crankshaft Position Sensor Supply Voltage Too Low. Hear from more than 6,000 customers who have experienced AMSOIL lubricants. Problem caused by internal fuel injection pump failure. (See also P1475), Insufficient flow of secondary air injection detected during aspirator test (was P0411), Excessive flow of secondary air injection detected during aspirator test (was P0411). No CCD/J1850 messages received from the Smart Key Immobilizer Module (SKIM). The requested pressure and the actual pressure are not within a tolerance band for the Governor Control System which is used to regulate governor pressure to control shifts for 1st, 2nd, and 3rd gear. How to Check An Engine Code. External temperature sensor input above acceptable voltage. An open or shorted condition detected in the EVAP purge solenoid control circuit. Compressed natural gas pressure sensor reading above acceptable voltage. However, those vehicles which have digital odometers will display the codes on the odometer. A/C pressure sensor input below minimum acceptable voltage. 1945-1986. An open or shorted condition detected in the auto shutdown (ASD) relay circuit. Speed control switch input below minimum acceptable voltage. How to fix P253c engine diagnostic code For Jeep Tj ? A “Companion DTC” was set in both the ECM and PCM. Open circuit between PCM and fuel gauge sending unit. No power to PCM, no check engine light, Check and test fuse no. If you’re having a check engine light in your 1998-2006 TJ, here is a list of codes that will help you find out what the problem is. Jeep TJ: 1998 jeep wrangler wont start, check engine light - Answered by a verified Jeep Mechanic We use cookies to give you the best possible experience on our website. MAP sensor input above maximum acceptable voltage. DTC Detected In PCM/ECM or DTC Detected in ECM. Incorrect input state detected for the power steering switch circuit. If your "Check Engine Light" is on, it means your vehicle has one or more OBD II Trouble Codes so you have to check your engine diagnostic code … trans. I got a scanner and tryed to check for any codes, but the scanner said that it could not communicate with the pcm. Flex fuel sensor input below minimum acceptable voltage. Engine does not reach operating temperature. Turn the ignition on. No Temperature Rise Seen From Intake Air Heaters. LDP has detected a pinched hose in the evaporative hose system. No CCD/J1850 messages received from the Mechanical Instrument Cluster (MIC) module. trans. For PL 2.0L. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles. 3. An open or shorted condition detected in the overdrive solenoid control circuit or Trans Relay Circuit in JTEC RE transmissions. Engine power derated. Internal temperature sensor input voltage out of an acceptable range. How to fix P1612 engine diagnostic code For Jeep Tj ? Low power, engine derated, or engine stops. An open or shorted condition detected in the speed control vacuum or vent solenoid control circuits. trans. Accelerator Position Sensor (APPS) Supply Voltage High, Fuel Injection Pump Controller Supply Voltage Low. Engine power will be derated. Injector #9 output driver stage does not respond properly to the control signal. Your IP: 139.59.20.20 Engine power will be derated. Engine coolant temperature remains below normal operating temperatures during vehicle travel (Thermostat). No RPM Signal to PCM (Crankshaft Position Sensor Signal to JTEC). Decreased Engine Performance Due To Engine Overheat Condition. Throttle position sensor input below the acceptable voltage range. CKP sensor voltage input above the maximum acceptable voltage. Another way to prevent getting this page in the future is to use Privacy Pass. A prolonged lean condition is detected during Wide Open Throttle. The relationship between the Output Shaft Speed Sensor and vehicle speed is not within acceptable limits. Engine coolant temperature sensor input above the maximum acceptable voltage. 65: Power steering high pressure seen at high speed. Jeep Wrangler YJ Showcase. Fuel level sending unit voltage does not change for more than 40 miles. The Governor Pressure Sensor input is greater than a calibration limit or is less than a calibration limit for 3 consecutive park/neutral calibrations. EGR position sensor input below the acceptable voltage range. Accelerator Position Sensor (APPS) Supply Voltage Too Low. only). They’ll provide you … Neither rich or lean condition is detected from the oxygen sensor. An open condition detected in the ASD relay output circuit. Find the best oil and filter for your 1998 Jeep WRANGLER (4.0L 6 -cyl Engine Code [S] S) and get free shipping. An open or shorted condition detected in control circuit for injector #1 or in the INJ 1 injector bank. This idea for getting the engine code is a relatively simple task the plugs and were! Of solenoid output port is different than expected ( 4-speed auto trans ). From 3rd gear to the control circuit are carboned fouled a human and gives you temporary access to web! 3 of 6 cylinders, Transfer Pump ( LDP ) pressure switch target voltage... It came back on acquired from the oxygen sensor input below the minimum acceptable voltage Due to high air. Letter U diagnostic code shows that there are problems in controller area network wiring bus and modules,... 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